* { box-sizing: border-box; }

:root {
  --bg:        #070a10;
  --panel:     #0f1521;
  --panel-2:   #131b2a;
  --line:      #1c2536;
  --line-2:    #263349;
  --text:      #e8f1ff;
  --muted:     #8fa0bb;
  --dim:       #6b7c96;
  --cyan:      #22d3ee;
  --blue:      #3b82f6;
  --violet:    #8b5cf6;
  --amber:     #f59e0b;
  --red:       #ef4444;
  --green:     #22c55e;
}

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font: 13px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(900px 520px at 10% -12%, rgba(34,211,238,.10), transparent 62%),
    radial-gradient(820px 560px at 105% -5%, rgba(139,92,246,.12), transparent 60%),
    linear-gradient(180deg, #070a10, #080c14 60%, #070a10);
  background-attachment: fixed;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 22px;
  background: rgba(9,13,21,.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34,211,238,.6), rgba(139,92,246,.6), transparent);
  opacity: .8;
}

.brand { display: flex; align-items: center; gap: 13px; min-width: 0; }

/* animated radar mark */
.radar {
  position: relative;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid rgba(34,211,238,.35);
  background:
    radial-gradient(circle at 50% 50%, rgba(34,211,238,.16), transparent 72%),
    #08111c;
  box-shadow:
    0 0 20px rgba(34,211,238,.22),
    inset 0 0 14px rgba(34,211,238,.14);
}
.radar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(34,211,238,.85),
    rgba(34,211,238,.18) 18%,
    transparent 32%,
    transparent 100%
  );
  animation: sweep 3.2s linear infinite;
}
.radar::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 50%;
  border: 1px solid rgba(34,211,238,.30);
}
@keyframes sweep { to { transform: rotate(360deg); } }

.brand-text { min-width: 0; }
.brand h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  background: linear-gradient(95deg, #eaf7ff 0%, var(--cyan) 46%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}
.brand h1 span { font-weight: 300; letter-spacing: 4px; }
.brand p {
  margin: 2px 0 0;
  font-size: 11px;
  letter-spacing: .4px;
  color: var(--dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge {
  flex: none;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(34,211,238,.28);
  background: rgba(34,211,238,.07);
  color: #86e9f8;
  font: 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 1px;
  text-transform: uppercase;
  box-shadow: 0 0 22px -8px rgba(34,211,238,.7);
}

/* ---------- Layout ---------- */
.app { display: flex; flex: 1; min-height: 0; }

.panel {
  width: 320px;
  flex: none;
  padding: 18px 16px 24px;
  background: linear-gradient(180deg, var(--panel), #0c1119);
  border-right: 1px solid var(--line);
  overflow-y: auto;
}

.panel h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--muted);
}
.panel h2::before {
  content: "";
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  box-shadow: 0 0 10px rgba(34,211,238,.7);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px 10px;
}
.grid label { margin: 0; min-width: 0; }

label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
  color: var(--muted);
}

input[type=number] {
  width: 100%;
  margin-top: 5px;
  padding: 7px 9px;
  background: #0a1018;
  border: 1px solid var(--line-2);
  border-radius: 7px;
  color: var(--text);
  font: 12px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button { opacity: .35; }
input[type=number]:focus {
  outline: none;
  border-color: var(--cyan);
  background: #0b1522;
  box-shadow: 0 0 0 3px rgba(34,211,238,.14);
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2px;
  text-transform: none;
  color: #b6c6dd;
  cursor: pointer;
  user-select: none;
}
.check em { color: var(--dim); font-style: normal; font-size: 10px; }
.check input[type=checkbox] {
  width: 15px;
  height: 15px;
  flex: none;
  margin: 0;
  accent-color: var(--cyan);
  cursor: pointer;
}

.derived {
  margin-top: 14px;
  padding: 10px 11px;
  background: #090e16;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: 11px/1.65 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #7d8ea9;
}
.derived b { color: #86e9f8; font-weight: 600; }
.derived .warn { color: var(--amber); }
.derived .err  { color: var(--red); }

button {
  width: 100%;
  margin-top: 12px;
  padding: 11px 14px;
  border: none;
  border-radius: 9px;
  font: inherit;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  color: #03121a;
  background: linear-gradient(120deg, var(--cyan), var(--blue) 52%, var(--violet));
  box-shadow: 0 10px 26px -12px rgba(59,130,246,.95);
  transition: transform .12s ease, filter .15s ease, box-shadow .15s ease;
}
button:hover:not(:disabled) {
  filter: brightness(1.12) saturate(1.1);
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -12px rgba(59,130,246,1);
}
button:active:not(:disabled) { transform: translateY(0); filter: brightness(.98); }
button:disabled {
  background: #141c29;
  color: #56657e;
  box-shadow: none;
  cursor: not-allowed;
}
button.secondary {
  background: var(--panel-2);
  color: #a9bcd6;
  border: 1px solid var(--line-2);
  box-shadow: none;
  font-weight: 600;
}
button.secondary:hover:not(:disabled) { background: #1a2434; filter: none; }

main {
  flex: 1;
  min-width: 0;
  padding: 22px;
  overflow-y: auto;
}

/* ---------- Dropzone ---------- */
#dropzone {
  padding: 34px 24px;
  text-align: center;
  cursor: pointer;
  border: 1.5px dashed #27344b;
  border-radius: 14px;
  background:
    radial-gradient(420px 160px at 50% 0%, rgba(34,211,238,.07), transparent 70%),
    linear-gradient(180deg, rgba(19,27,42,.65), rgba(10,15,24,.65));
  transition: border-color .18s, box-shadow .18s, background .18s, transform .18s;
}
#dropzone:hover {
  border-color: rgba(59,130,246,.7);
  box-shadow: 0 0 0 4px rgba(59,130,246,.07);
}
#dropzone.hover {
  border-color: var(--cyan);
  background: rgba(34,211,238,.06);
  box-shadow: 0 0 0 4px rgba(34,211,238,.12), 0 0 48px -14px rgba(34,211,238,.85);
  transform: translateY(-1px);
}
#dropzone strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: .3px;
  color: var(--text);
}
#dropzone small { color: var(--dim); font-size: 12px; letter-spacing: .2px; }

#dropzone .thumb {
  display: block;
  margin: 14px auto 0;
  max-width: 100%;
  border-radius: 8px;
  background: #000;
  border: 1px solid var(--line-2);
  box-shadow: 0 12px 30px -18px #000;
}

.hidden { display: none !important; }

/* ---------- Estimate ---------- */
.estimate {
  margin-top: 14px;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid rgba(59,130,246,.28);
  border-left: 3px solid var(--blue);
  background: linear-gradient(180deg, rgba(59,130,246,.10), rgba(59,130,246,.03));
  font-size: 13px;
}
.estimate .big {
  display: inline-block;
  margin-left: 5px;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.2px;
  color: #7cc4ff;
  text-shadow: 0 0 22px rgba(59,130,246,.55);
}
.estimate .detail {
  display: block;
  margin-top: 5px;
  font: 11px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--dim);
}
.estimate.heavy {
  border-color: rgba(245,158,11,.3);
  border-left-color: var(--amber);
  background: linear-gradient(180deg, rgba(245,158,11,.10), rgba(245,158,11,.03));
}
.estimate.heavy .big { color: #fbbf24; text-shadow: 0 0 22px rgba(245,158,11,.5); }
.estimate.extreme {
  border-color: rgba(239,68,68,.32);
  border-left-color: var(--red);
  background: linear-gradient(180deg, rgba(239,68,68,.10), rgba(239,68,68,.03));
}
.estimate.extreme .big { color: #f87171; text-shadow: 0 0 22px rgba(239,68,68,.5); }

/* ---------- Stages ---------- */
.stages {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 18px;
}
.stage {
  padding: 11px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #111827, #0c121e);
  box-shadow: 0 18px 40px -30px #000;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.stage:hover {
  border-color: #2f405c;
  transform: translateY(-2px);
  box-shadow: 0 24px 46px -28px #000;
}
.stage h3 {
  margin: 0 0 9px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .35px;
  color: #c3d3ea;
}
.stage.final { grid-column: 1 / -1; }
.stage.final h3 { color: #86e9f8; }
.stage canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 7px;
  background: #05080d;
}

/* ---------- Log ---------- */
#log {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #06090e;
  font: 11px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #8093ad;
  max-height: 170px;
  overflow-y: auto;
  white-space: pre-wrap;
}
#log .err  { color: var(--red); }
#log .warn { color: var(--amber); }
#log .ok   { color: var(--green); }

/* ---------- Scrollbars ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: #223048;
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover { background: #2f4160; background-clip: padding-box; }
* { scrollbar-width: thin; scrollbar-color: #223048 transparent; }

/* ---------- Narrow screens ---------- */
@media (max-width: 860px) {
  .app { flex-direction: column; }
  .panel { width: 100%; border-right: none; border-bottom: 1px solid var(--line); }
  .stages { grid-template-columns: 1fr; }
  .brand p { display: none; }
  .badge { display: none; }
}